Which of these is a weakened or dead form of a pathogen that causes an immune response?

antibody

vaccine

antigen

inflammation

What is the phosphorus cycle?

Which of the following is one piece of evidence for the endosymbiotic origin of eukaryotic organelles? A. mitochondria have flagella B. mitochondria have single membranes C. chloroplasts reproduce by binary fission D.

Consider that two bacteria produced by binary fission do not have the same phenotype. The most likely explanation is that A they are genetically different B the cells are not undergoing transcription and translation C the cells have different cell

After several weeks as a tadpole, an amphibian in the vertebrate class of Anura develops legs and move onto land. Which characteristic of life in this activity known as? A) adaptation B) metabolism C) digestion D) growth

Which best describes singing behavior in birds

Rna polymerase binds to regions pf dna called blank which are start sinals for transcription

When a cells volume becomes to great for the surface area to maintain the cell will A) die. B) divide. C) grow. D) move.

Fatty acids and glycerol are produced from the metabolism of

A rabbit is eating leafy plants on a sunny day. What is happening to the carbon in the plants and in the rabbit? a Carbon is only moving out of the living things; it is not moving into them. b With this information, there is no way to know for sure.

During the process of RNA transcription, which of the following steps is not included?